ABOUT MAC MACHINE · 1976–2026

Family-owned precision, 50 years and counting.

Mac Machine Company is a privately held, family-owned manufacturer in Baltimore, Maryland. For nearly five decades we've built a reputation for tight-tolerance, made-to-print parts that clear inspection the first time.

Today our 35,000 ft² facility runs advanced 5-axis machining, turning, EDM, NADCAP-certified welding, and assembly with 60+ skilled, non-union team members. We reinvest continuously — over $6M in equipment across the last five years — and support the next generation of machinists through local vocational programs.

MISSION

"To build lasting partnerships by committing fully to our customers, team members, and community. Through our skilled workforce, we pursue superior efficiency and precision to deliver top-quality, mission-critical products on time."

MILESTONES

1976Founded by George McNab as a family-owned machine shop on Desoto Rd. in Baltimore, MD.

1980Moved manufacturing to a larger facility on Whitehead Rd. in Baltimore, MD.

1998Ran our first unattended, lights-out machining operation.

2002Moved into our current facility on Rutherford Rd. in Windsor Mill, MD.

2008Went paperless on the shop floor and won the Matsuura International 5-Axis Machining Competition.

2017Company purchased by the Pennypacker family.

2020sOver $6M reinvested in equipment across five years.

2025$1M+ new 5-axis Matsuura MAM70-72V added to the floor.

2026Makino Wire EDM purchased to expand EDM capacity.